Bogon check

Check whether an address is inside explicit private, reserved, documentation, multicast or other non-ordinary public-unicast space.

10.0.0.1

Special-purpose / Bogon

Address family: IPv4
Classification: Private address
Matched range: 10.0.0.0/8
Reference: RFC 1918

This address is inside an explicit special-purpose or non-global-unicast range and should not be treated as an ordinary public address.

Address type is not a reachability test

This tool uses built-in special-purpose ranges to identify private, loopback, link-local, documentation and reserved addresses. It is not an IP blocklist or a live routing database.

Two examples, explainedCalculated examples

Private addressRFC 1918

Input IP: 10.0.0.1
Matched block: 10.0.0.0/8

Documentation addressRFC 3849

Input IP: 2001:db8::1
Matched block: 2001:db8::/32

Type is not reputationSpecial-purpose does not mean malicious; no match does not guarantee reachability or safety.

Common questions

Is this a live, complete Full Bogon feed?

No. Unallocated space changes. This tool does not continuously synchronize all allocations and BGP state or replace a dynamic route-filtering feed.

Should I block a private address?

It depends on where it appears. Private addressing is normal internally; public-edge filtering depends on your topology and security policy.

Does no match guarantee a public address?

No. This checks built-in special-purpose rules, not live allocations or BGP routes. It does not test connectivity or reputation.

Is 100.64.0.0/10 ordinary private space?

It is shared address space defined by RFC 6598, commonly used for carrier-grade NAT. It is a different category from RFC 1918 private space.

Where do 127.0.0.1 and ::1 point?

Both are loopback addresses referring to the device using them, not a remote host directly reachable over the public internet.

Which rule is shown if several match?

The most specific matching prefix and its reference are shown. Interpret its purpose by category instead of treating every special-use address as an attack source.